. "without beginning or end , eternal (sempiternus denotes what is perpetual, what exists as long as time endures, and keeps even pace with it; aeternus, the eternal , that which is raised above all time , and can be measured only by œons . Thus the sublime thought, without beginning and end, is more vividly suggested by aeternus than by sempiternus , since the former has more direct reference to the long duration of the eternal, which has neither beginning nor end. Sempiternus is rather a mathematical, aeternus" . "without beginning or end , eternal (sempiternus denotes what is perpetual, what exists as long as time endures, and keeps even pace with it; aeternus, the eternal , that which is raised above all time , and can be measured only by œons . Thus the sublime thought, without beginning and end, is more vividly suggested by aeternus than by sempiternus , since the former has more direct reference to the long duration of the eternal, which has neither beginning nor end. Sempiternus is rather a mathematical, aeternus" . .